1. Elijah, 5, asks: what colour is the sun?

   1. Green

   2. Pink

   3. White

   4. Yellow

2. Luna, 7, asks: how do things glow in the dark?

   1. Bioluminescence

   2. Chemiluminescence

   3. Fluorescence and phosphorescence

   4. All of the above

3. Charlie, 5, asks: at a rocket launch, why do we count the numbers backwards?

   1. It helps everyone involved know exactly when the rocket will launch – but it was first used in a film to increase the drama!

   2. The first astronaut panicked, counted backwards, and now everyone does it

   3. It began as a system glitch

   4. Nasa’s clock is broken

4. Gretel, 7, asks: why don’t mosquitoes bite your face?

   1. Mosquitoes don’t like to risk smelling bad breath

   2. Faces have too many natural oils

   3. Mosquitoes are too scared of being eaten

   4. They do bite your face

5. Freyja, 8, asks: why do animal species only breed with each other but horses and donkeys can breed and make a mule?

   1. Horses, donkeys and mules are the exact same species

   2. Animal species don’t always only breed with each other

   3. Horses and donkeys fall in love – no other species except humans does this

   4. Nobody knows

Solutions

1:C - The sun contains all the wavelengths on the visible light spectrum, so it appears white. It looks yellow to us on Earth because warmer colours travel through our atmosphere, but cooler blue tones are scattered., 2:D - Chemiluminescence is produced by a chemical reaction, as in glow sticks. Bioluminescence is the same as chemiluminescence, but occurs in living organisms like some fish and jellyfish. Fluorescence is the type that glows under a UV light., 3:A - Counting down was first used for a rocket launch in a 1929 German film called Frau im Mond (Woman in the Moon), to create extra drama. A countdown means everyone knows when it will end, so the tradition stuck., 4:D - Mosquitoes are drawn to body scent, to areas rich with blood vessels, and to the carbon dioxide we breathe out. This makes your face – and your arms, legs, ankles and back – attractive to the mosquito! , 5:B - Mules aren’t the only genetic animal hybrids. Other examples include a zonkey (zebra and donkey), yakalo (yak and bison) and a pizzly bear (polar bear and grizzly bear).

Scores

1. 5 and above.

2. 4 and above.

3. 3 and above.

4. 2 and above.

5. 0 and above.

6. 1 and above.